These blocks have two 'broken L' varieties, spaced five wide. By the frequency of this variety, which is lower than it would be if the place was made with a 5 by 2 matrix, I am guessing this plate was constructed with a 5 x 5 matrix.
![](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_uy1WoTefOO8XW_-1iKotU573Yi3ySoPgVHJAiC5GszodAgthpFX43fQAkYiDCTNs7QvDk5eFGGEbeVtfKP05xiJUjzo3lRkq61n37HW4oQ7EqCVqXVWHDwmJDzCV-T1F2LLIXuXiLactOYyWmNs1gv3laFAfbhqhktDYcVH-0FOdD5y3pzn3sxkUsnb2KTt62bUof3dJPK=s0-d)
First row, first stamp
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First row, second stamp
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First row, sixth stamp
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![](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_u3mGQW6qpze5fqBbMhz3fa5HZkBmHw3s1VX_M9Jtc8LMn16T3bh0aS7bsKmCCJWdMO-nlsGHvZ805yq2qmyu-Ml2oMLsemQH8Yr9k9PQwtcDYpXOsGPAfieZ_kOJTjKK9-OFp4pL_dUf9tYP3L2bNkIk7HipuWF72XpVQ3g9UD5md5WdGmbgLkV79hRDuXjq8XutSpg4omYW4=s0-d)
First row, first stamp
![](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_sELZz0xbCINrWryiAe6u4ndlmZgsFsSPmoNPjTNlpxMY-MLUk7LY-NYx-ImEB9oVzmXwzAvZTieb1h_7GPQuxSAHx8ie2Q9xd4PsYaeDn_PJYFtNWdswHBuBII8FdxLLP-PBvVwwXe3foQgm-m-y7hSetbXgRwDB3sTXZ7BZKVb6_Yc0bqMu43twAzjoeFFAGJA3VXP_rXfse3FkkYoA=s0-d)
First row, sixth stamp